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Date: Fri, 22 Aug 2011 17:10:10 +0430
From: Ali Gholami Rudi <ali@rudi.ir>
To: Matthew Garrett <mjg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        Keith Packard <keithp@keithp.com>,
        Michel Alexandre Salim <salimma@fedoraproject.org>,
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        Sedat Dilek <sedat.dilek@googlemail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org
Subject: Re: missing acpi backlight bisected to 9661e92c10
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Matthew Garrett <mjg@redhat.com> wrote:
> 
> On Mon, Aug 22, 2011 at 10:25:24AM +0430, Ali Gholami Rudi wrote:
> 
> > Yet, /sys/devices/virtual/backlight/acpi_video0/brightness only
> > appears after the revert.  Seems something changes its behavior
> > if new_bd->dev.parent is not NULL in backlight_device_register().
> 
> Well, yes, if it has a parent it won't be under /sys/devices/virtual. 
> Does it appear under /sys/class/backlight ?

Yep!  Thought this is the 2.6.38-rc1 issue coming back (I really
thought I had searched /sys...).  Sorry for the noise.

Thanks,
Ali